Maria P.
| Name | Maria P. |
| Type | Sailing vessel |
| GRT | 263 tons |
| Country |  British |
| Built | 1876 |
| Builder | A. Briasco, Sestri Ponente |
| Operator | S. Portelli, Malta |
| History | Wooden Barkentine. Built as Hortensea Costa |
U-boat attacks on Sailing vessel Maria P.
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 18 Jan 1918 | U 63 (Kurt Hartwig) | Sunk | Stopped and sunk 75 miles W from Cape Mannu, Sardinia | 39.52N, 06.36E | Alicante - Malta | 0 |
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